Shereen Meraji/KPCC

A wall of tortillas displayed at the Super King in Glassell Park.

A titan of the tortilla industry died last week: Roberto Gonzalez Barrera was a Mexican a billionaire who founded Gruma - the world's largest corn flour and tortilla company. Barrera died from pancreatic cancer at the age of 81.

He had a huge impact on the way tortillas are produced and consumed in North America.

Gustavo Arellano joins the show to discuss his legacy. He is the editor of the OC Weekly and author of the book "Taco USA: How Mexican Food Conquered America"